A tort is a civil wrong that causes physical or financial harm to another.

Even if it was in violation of the lease for the tenant to change the locks, if I get the keys, no harm/no foul in my view.If I am not getting the keys, that probably means the keys are the least of my worries - legally or condition-wise.Exception: if I weren't already evicting (or the tenant wasn't already vacating), and if the lease wasn't near the end, and if the tenant was troublesome but paid on time, then I *might* use the change of locks as an excuse to terminate the lease (if the lease allowed me to do so) and then serve the tenant with a 30-day notice.  

Reacting to bad tenants, threats, or fear, will cause you more harm then if you sit back,  implement your lease agreement (according to the laws of your state), and let the courts do their job. 

Full disclosure: I am a newbie with no entities of my own.Per the podcasts I've heard related to entities, there is no harm in flipping a few in your name, before worrying about asset protection.

If they are being considerate and giving adequate time for the old landlord to find a new tenant no harm no foul.

There is mold and mildew and different types of strains so more harmful than others.

Question should be, how is the seller harmed, did he lose marketing time toward the end of the summer and/or a sale?

The lawsuit, which alleged that the turf state laws harmed consumers by preventing access to the national market for commercial real estate brokerage and depressing real estate prices, was filed by a group of consumers, real estate brokers with Marcus & Millichap Real Estate Investment Services, a national commercial real estate services firm based in Encino, Calif. leading the suit.

Stress is very harmful and no amount of money is worth your well being.

Well rental income would be taxable normally anyway so there is no real harm done,